Q31
Life cycles of Ectocarpus and Fucus respectively are
Correct Answer
Option B
Solution
Ectocarpus possesses haplodiplontic whereas Fucus possesses diplontic life cycle.
Plant Kingdom
Q32
An example of colonial alga is
Correct Answer
Option A
Solution
Volvox is a motile colonial freshwater green alga that forms spherical colonies.
Q33
Select the mismatch
Correct Answer
Option D
Solution
Pinus is monoecious, having both male and female cones on the same plant.
Q34
Conifers are adapted to tolerate extreme environmental conditions because of
Correct Answer
Option C
Solution
Needle-like leaves with thick cuticle and sunken stomata are xerophytic adaptations of conifers.
Q35
Which one of the following statements is wrong?
Correct Answer
Option B
Solution
Alginic acid is obtained from brown algae whereas carrageenan is obtained from red algae.
Q36
In bryophytes and pteridophytes, transport of male gametes requires
Correct Answer
Option B
Solution
The sperms of bryophytes and pteridophytes are flagellated and require an external supply of water to reach archegonia.
Q37
Select the correct statement
Correct Answer
Option A
Solution
Sequoia sempervirens is one of the tallest trees.
Q38
Which one is a wrong statement?
Correct Answer
Option D
Solution
Mucor is a Zygomycetes in which motile cells like zoospores are absent.
Asexual reproduction by non-motile sporangiospores.
Q39
Which one of the following statements is wrong?
Correct Answer
Option B
Solution
Laminarin and mannitol are food reserves of brown algae (Phaeophyceae).
Rhodophycean algae store food as floridean starch.
Q40
Male gametes are flagellated in
Correct Answer
Option A
Solution
Male gametes are flagellated in Ectocarpus (Phaeophyceae). They possess heterokont, lateral flagella.
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